Jean M W Chatterton

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 The aim of this study was to identify a sustainable cell line and culture method that could continuously provide a sufficient quantity of Toxoplasma gondii tachyzoites to serve the needs of a general hospital laboratory. Three continuous cell lines (HeLa, LLC and Vero) and three cell-culture methods (culture in conventional flasks, culture in(More)
BACKGROUND Most of the samples sent to reference laboratories are delivered by post. Thus, diagnostic PCR tests on blood samples have to be performed using methods which are optimised and validated for such conditions. There is a low probability that the organisms Toxoplasma gondii and Borrelia burgdorferi will be present. AIM To confirm that robotic(More)
AIMS To assess the value of detecting Toxoplasma gondii in human blood samples using the polymerase chain reaction (PCR). METHODS Blood samples in lithium heparin were examined from 34 patients with suspected toxoplasmosis, and six healthy volunteers with or without the addition of doubling dilutions of toxoplasma tachyzoites. Products of a nested PCR,(More)
AIMS To assess the diagnostic usefulness of Toxoplasma gondii tachyzoites produced by serial passage in HeLa cell culture. METHODS Tachyzoites derived from serial passage in cell culture were used in the dye test. Human sera were also examined to determine their suitability for use as accessory factor. Using the optimum conditions, the dye test using cell(More)
The aim of this study was to develop a culture method for Toxoplasma gondii that could provide fresh viable tachyzoites as and when required. When T. gondii was continuously maintained in HeLa cell cultures at 37 degrees C, the time to harvest varied from 48 to 144 h. Tachyzoite yields of > or = 1 x 10(6)/ml and > or = 90% viable were obtained from 519/882(More)
Four out of 6 goats from a small British goat herd gave birth to weak or stillborn kids. All were seropositive for Toxoplasma gondii. The parasite was isolated from the tissues of one kid and the milk of one goat. Concurrently, one of the goatowner's sons developed a mononucleosis-like illness with serological evidence of current toxoplasma infection.(More)
A two-stage polymerase chain reaction (PCR) assay employing oligonucleotide primers from the B1 gene of Toxoplasma gondii was developed and assessed for sensitivity and specificity. It was able to detect T. gondii DNA from as little as one parasite/sample in mock-infected rat or mouse leucocyte preparations. Parasitaemia was also identified in animals at(More)
Nine Scottish Borrelia burgdorferi isolates were investigated in IgG Western blot tests. Sera previously found to be positive and negative when tested by routine Western blots prepared from reference strain B. burgdorferi sensu stricto antigen had different outcomes with these isolates. Two isolates, E5 (Borrelia afzelii) and G4 (B. burgdorferi sensu(More)
A method for the simple preparation of biotin-labelled toxoplasma antigen was used with avidin peroxidase in an IgM-capture enzyme linked immunosorbent assay (BAM-ELISA). Although the overall predictive value of a positive result was only 38%, its low cost and 100% sensitivity makes it a very suitable screening test. Positive results can be confirmed by an(More)
This study reviews the Lyme borreliosis Western blot interpretation process, including what bands are classed as specific, the number of bands needed for a positive result, the role of band intensity and the use of clinical information. In 2008, 3688 patients (4223 serum samples) were tested by enzyme immunoassay (EIA), with 832 patients tested by(More)